Reading Planet--The New Treehouse--Green

Comet Street Kids reading books follow the adventures of Rav, Asha, Tess and Finn, four of the residents of Comet Street. There are 72 exciting stories in the series that children won't be able to put down.
Finn's grandad is building him a treehouse! Finn and Rav can't wait to play in it, but it's not quite ready. In fact, Grandad has a lot still to build, and everything keeps going wrong! Will it ever be finished?
Reading age: 5-6 years